CN101332475A - Automatic control method of head orientation of laying head - Google Patents
Automatic control method of head orientation of laying head Download PDFInfo
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- CN101332475A CN101332475A CNA200810071019XA CN200810071019A CN101332475A CN 101332475 A CN101332475 A CN 101332475A CN A200810071019X A CNA200810071019X A CN A200810071019XA CN 200810071019 A CN200810071019 A CN 200810071019A CN 101332475 A CN101332475 A CN 101332475A
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Abstract
The invention discloses an automatic control method for head positioning of a laying head and relates to a rolled steel laying head system. The automatic control method is characterized in that a hot metal detector is arranged on the front end of a flying shear and the front of the laying head, a photoelectric inductor is arranged above a laying disc to transmit information to a CPU for calculating the operation speed of wires and phase angle of the wire head in the laying disc, the errors are compared to correct the shearing time of the flying shear and control the sheared length. The system has the advantages that the head positioning error of the laying head is reduced, the positioning of the laying disc is realized by photoelectric tube signals, and the CPU data processing is carried out based on the wire head phase angle, rectilinear motion speed of the wires and the rotary speed of the laying disc, thus controlling the shearing time or the rotary speed of the laying disc, and cause the controlled angle precision to be within 30 degrees.
Description
Technical field:
The present invention is applied to steel rolling and weaves silk in the system, and the head of steel wire rod is positioned.
Background technology:
On the rolling reinforcing bar wire rod production line, after wire rod is by the roughing mill outlet, the end of a thread is irregular can influence to enter the finishing mill roll, so must adorn the portion of decaptitating with shear arrangement, cut into the certain-length wire rod through shear arrangement, this wire rod enters the Laying head circle through finishing mill after rolling again and is rolled into bundle, carries following one packing process by air-cooled roller-way.
Laying head head location automatic control technology is the technology that the position positions that falls of the head to wire rod, makes the head of the steel wire rod position that falls as required.In rolling system, during the Laying head operation, spinneret is done rotation at a high speed, rolled piece is fallen on the air-cooled roller-way through the wire rod that Laying head becomes the circle with certain radius, the center of circle line of weaving silk is perpendicular to ground, and the wire rod after coiling bundle to enter rollgang be parallel with circle volume center line with roller-way transmission direction line, the wire rod head is preceding.Because air-cooled roller-way is installed side by side by many circular rollers, bigger gap is arranged between the roller of air-cooled roller-way and the roller, when finished product wire rod process Laying head, the position is irregular owing to fall, if the head of wire rod is positioned at bottom and forward then be inserted into the slit of roller-way easily, if the head of wire rod is near the side plate of roller-way then scrape side plate easily.For fear of this two kinds of faults that situation causes, the position that must fall to the head of wire rod is controlled, and wire rod is dropped on the air-cooled roller-way by appointed positions.Because the wire rod head is behind the dish circle volume of weaving silk, the reinforcing bar of rolling up behind the meeting quilt twines, when sending into roller-way, manually also can't hook moving-wire material head, and the wire rod afterbody is in the outer ring, rear portion, when sending into roller-way, manually can also hook afterbody and change its state angle, so the control of the phase angle of wire rod head is most important.
There is certain problem in existing Laying head head location, because the spinneret of Laying head is rotation at a high speed, and the radius of Laying head volume bowlder wire rod becomes greatly gradually, and the speed ratio that coils of weaving silk is different, have certain difficulty when weaving silk the dish position in the location, control accuracy can not reach requirement.
The present domestic main two kinds of control methods that adopted:
1. by changing the preceding flying shear sheared length of finishing mill.The principle of this method is the artificial in advance sheared length of setting flying shear of calculating, and adjusts the time that rolled piece arrives the mouth of pipe of weaving silk, to reach the purpose at control workpiece front end phase angle.There is bigger error in this method in computational process when the speed ratio of Laying head is different, there is certain difficulty in the location when weaving silk the dish position, and control accuracy can not reach requirement.
2. by changing the rotating speed of Laying head, realize head location to Laying head.There is bigger error in this method in artificial computational process when the speed ratio of Laying head is different.
3. since the Laying head rotating speed at 1500r/min, the signal of motor encoder collection and weaving silk is taken inventory the speed ratio certain, the sampling time error is bigger, has certain difficulty when weaving silk the dish position in the location.
Summary of the invention:
The objective of the invention is to overcome above-mentioned defective, a kind of automatic control method of head orientation of laying head is provided.
The solution of the present invention one is: at the flying shearing machine front end hot metal detector HMD1 is set, hot metal detector HMD2 is set before the Laying head behind finishing mill, both sides fixed light fulgurite and receiver thereof above the dish of weaving silk, at the optoelectronic induction piece of dish upper fixed of weaving silk, the temporal information that two hot metal detectors arrive the wire rod head this detection position respectively is transferred to central processor CPU, and the temporal information that photoelectric tube also will detect the optoelectronic induction piece simultaneously is transferred to central processor CPU;
Central processor CPU is done following running:
1, the temporal information of photoelectric tube being imported sensor block calculates the rotating speed of the dish of weaving silk, and calculates the weave silk phase angle of dish of per period at times with the time that rotates a circle;
2, the temporal calculation that two hot metal detectors input wire rod head is arrived goes out the wire rod point-to-point speed;
3, calculate the arrival phase angle that the wire rod head arrives the dish of weaving silk with hot metal detector HMD2 with distance, the wire rod linear running speed of the dish of weaving silk, the dish rotating speed of weaving silk, the instant phase angles data of dish of weaving silk;
4, arrive the phase angle with the wire rod head, the dish rotating speed of weaving silk, the dish blanking Time Calculation of weaving silk go out wire rod head blanking phase angle;
5, the blanking phase angle standard value with blanking phase angle and setting compares computing, calculates relative error;
6, relative error, the dish rotating speed of weaving silk, the dish diameter of weaving silk, wire rod point-to-point speed are calculated wire rod cover length correction value;
7, calculate the time correction value that the wire rod head enters the dish of weaving silk with wire rod cover length correction value, calculate back single line material with this time correction value again and shear the correction time;
8, flying shear is sheared correction time input flying shear control device;
The flying shear shearing control device adds lead start-up time with the shearing correction time of input, start shear arrangement back single line material sheared so that wire rod behind finish rolling, circle volume the end of a thread blanking phase angle in the given time.
The solution of the present invention two is: at the flying shearing machine front end hot metal detector HMD1 is set, hot metal detector HMD2 is set before the Laying head behind finishing mill, both sides fixed light fulgurite and receiver thereof above the dish of weaving silk, at the optoelectronic induction piece of dish upper fixed of weaving silk, the temporal information that two hot metal detectors arrive the wire rod head this detection position respectively is transferred to central processor CPU, and the temporal information that photoelectric tube also will detect the optoelectronic induction piece simultaneously is transferred to central processor CPU;
Central processor CPU is done following running:
1, the temporal information of photoelectric tube being imported sensor block calculates the rotating speed of the dish of weaving silk, and calculates the weave silk phase angle of dish of per period at times with the time that rotates a circle;
2, the temporal calculation that two hot metal detectors input wire rod head is arrived goes out the wire rod point-to-point speed;
3, calculate the arrival phase angle that the wire rod head arrives the dish of weaving silk with hot metal detector HMD2 with distance, the wire rod linear running speed of the dish of weaving silk, the dish rotating speed of weaving silk, the instant phase angles data of dish of weaving silk;
4, arrive the phase angle with the wire rod head, the dish rotating speed of weaving silk, the dish blanking Time Calculation of weaving silk go out wire rod head blanking phase angle;
5, the blanking phase angle standard value with blanking phase angle and setting compares computing, calculates relative error;
6, relative error, the dish rotating speed of weaving silk, the dish diameter of weaving silk, wire rod point-to-point speed are calculated the dish rotating speed correction value of weaving silk, just this correction value input Laying head control device;
The Laying head control device is pressed the rotating speed correction value, regulates motor speed by Laying head transmission cabinet, makes single line material head blanking phase angle, back in given scope.
The invention has the advantages that: native system has solved the bigger problem of Laying head head position error, realize the dish location of weaving silk by the photoelectric tube signal, carry out cpu data and handle with the end of a thread phase angle, wire rod point-to-point speed, the dish rotating speed of weaving silk, the control flying shear time or the dish rotating speed of weaving silk make the angle precision of control reach within 30 degree.
Description of drawings:
Fig. 1 is photoelectric tube installation site figure.
Fig. 2 is the rolling line schematic diagram.
The specific embodiment:
The solution of the present invention one is: at the flying shearing machine front end hot metal detector HMD1 (1) is set, at the preceding hot metal detector HMD2 (4) that is provided with of finishing mill (3) back Laying head (5), at dish (9) top both sides fixed light fulgurites (7) and the receiver thereof of weaving silk, at dish (9) the optoelectronic induction piece of upper fixed (8) of weaving silk, the temporal information that two hot metal detectors arrive the wire rod head this detection position respectively is transferred to central processor CPU, and the temporal information that photoelectric tube (7) also will detect optoelectronic induction piece (8) simultaneously is transferred to central processor CPU;
Central processor CPU is done following running:
1, the temporal information of photoelectric tube (7) input sensor block (8) is calculated the rotating speed of dish (9) of weaving silk, and calculate the weave silk phase angle of dish (9) of per period at times with the time that rotates a circle;
2, the temporal calculation that two hot metal detectors input wire rod head is arrived goes out the wire rod point-to-point speed;
3, calculate the arrival phase angle that the wire rod head arrives the dish (9) of weaving silk with hot metal detector HMD2 (4) with distance, wire rod linear running speed, dish (9) rotating speed of weaving silk of dish (9) of weaving silk, the instant phase angles data of the dish (9) of weaving silk;
4, arrive the phase angle with the wire rod head, dish (9) rotating speed of weaving silk, dish (9) the blanking Time Calculation of weaving silk go out wire rod head blanking phase angle;
5, the blanking phase angle standard value with blanking phase angle and setting compares computing, calculates relative error;
6, relative error, dish (9) rotating speed of weaving silk, dish (9) diameter of weaving silk, wire rod point-to-point speed are calculated wire rod cover length correction value;
7, calculate the time correction value that the wire rod head enters the dish (9) of weaving silk with wire rod cover length correction value, calculate back single line material with this time correction value again and shear the correction time;
8, flying shear is sheared correction time input flying shear control device;
The flying shear shearing control device adds lead start-up time with the shearing correction time of input, start shear arrangement (2) back single line material sheared so that wire rod behind finish rolling, circle volume the end of a thread blanking phase angle in the given time.
The solution of the present invention two is: at the flying shearing machine front end hot metal detector HMD1 (1) is set, at the preceding hot metal detector HMD2 (4) that is provided with of finishing mill (3) back Laying head (5), at dish (9) top both sides fixed light fulgurites (7) and the receiver thereof of weaving silk, at dish (9) the optoelectronic induction piece of upper fixed (8) of weaving silk, the temporal information that two hot metal detectors arrive the wire rod head this detection position respectively is transferred to central processor CPU, and the temporal information that photoelectric tube (7) also will detect optoelectronic induction piece (8) simultaneously is transferred to central processor CPU;
Central processor CPU is done following running:
1, the temporal information of photoelectric tube (7) input sensor block (8) is calculated the rotating speed of dish (9) of weaving silk, and calculate the weave silk phase angle of dish (9) of per period at times with the time that rotates a circle;
2, the temporal calculation that two hot metal detectors input wire rod head is arrived goes out the wire rod point-to-point speed;
3, calculate the arrival phase angle that the wire rod head arrives the dish (9) of weaving silk with hot metal detector HMD2 (4) with distance, wire rod linear running speed, dish (9) rotating speed of weaving silk of dish (9) of weaving silk, the instant phase angles data of the dish (9) of weaving silk;
4, arrive the phase angle with the wire rod head, dish (9) rotating speed of weaving silk, dish (9) the blanking Time Calculation of weaving silk go out wire rod head blanking phase angle;
5, the blanking phase angle standard value with blanking phase angle and setting compares computing, calculates relative error;
6, relative error, dish (9) rotating speed of weaving silk, dish (9) diameter of weaving silk, wire rod point-to-point speed are calculated dish (9) the rotating speed correction value of weaving silk, just this correction value input Laying head (5) control device;
Laying head (5) control device is pressed the rotating speed correction value, regulates motor speed by Laying head (5) transmission cabinet, makes single line material head blanking phase angle, back in given scope.
For head it off, we adopt and in the both sides of the dish (9) of weaving silk a pair of photoelectric tube (7) (OMROM E3N-30LH4-G) (Fig. 1 is seen in the installation site) are installed, because its response time can reach 3ms, can satisfy our location needs to the dish (9) of weaving silk, go up an installation sensor block (8) (Fig. 1 is seen in the installation site) at the dish (9) of weaving silk, the every bright signal that once produces of photoelectric tube (7), this signal is passed to Laying head (5) control panel, and PLC passes to the flying shear control panel by calculating with this signal.PLC carries out communication by Ethernet with host computer PC, connects with flying shear and Laying head (5) transmission device by PROFIBUS DP, and PLC gathers the signal of HMD by the I/O point.
Fig. 1 is photoelectric tube (7) installation site figure, we are by the location of this photoelectric tube (7) realization to dish (9) angle of weaving silk, photoelectric tube (7) be positioned the to weave silk both sides of dish (9), distance are for from weaving silk dish (9) edge 20CM, sensor block (8) be positioned at the dish (9) of weaving silk directly over.
Fig. 2 is the rolling line schematic diagram, is the layout drawing of equipment behind No. 3 flying shears of our factory.
Operation principle of the present invention is as follows:
(1) the sheared length control of adjustment flying shear, the start-up time of adjustment flying shear, we are by increasing the sheared length of flying shear, and the adjustment rolled piece arrives the time of the mouth of pipe of weaving silk, to reach the purpose of controlling workpiece front end.The method of control: after the head of rolled piece arrived the mouth of pipe of weaving silk, PLC obtained actual angle, by comparing with given angle, calculated the angle that makes new advances.When the hot metal detector HMD1 (1) before next root rolled piece arrival flying shear, weave silk the at this moment angle value of the mouth of pipe of computer sampling, calculate the time value that flying shear is proofreaied and correct according to the rotary speed of this angle value and new angle value and Laying head (5) and the advance value of Laying head (5) pinch roll then, this value and the addition of preseting length flying shear shear time have just been obtained start-up time of flying shear, passed to the flying shear integrated circuit board then and control.The sequence of movement of flying shear is: stop → quickening → shear → return initial position → parking, the quick response of 3# flying shear, instantaneous start-stop can guarantee the precision sheared, and the angle that guarantees to arrive the mouth of pipe of weaving silk is accurate.When the sheared length of using flying shear was controlled, we can pass through the given angle value of man-machine interface, by more given and error actual angle, can judge the accuracy of head location, judged to carry out fault fast.The control thinking is as follows:
First steel is to the mouth of pipe of weaving silk → sampling actual angle → comparator computing → new angle
Second steel to HMD1 → sampling weave silk the time value that angle → internalarithmetic → flying shear of the mouth of pipe proofreaies and correct → add computing → flying shear start-up time → pass to the flying shear integrated circuit board to control
(2) adjust the control of Laying head (5) speed, the another kind of method that realizes Laying head (5) location is a workpiece front end through before the pinch roll during hot metal detector HMD2 (4), by detecting set point angle and rolled piece actual angle error, given through integrator generation position, behind the generation speed set-point of comparing with the rolled piece physical location, send Laying head (5) transmission cabinet, workpiece front end is come out according to given position from Laying head (5) mouth of pipe by regulating Laying head (5) motor speed.When selecting Laying head (5) when speed positions pattern, first steel is to the mouth of pipe of weaving silk, and the sampling actual angle obtains new angle by the comparator computing; Second steel be to HMD1, and the weave silk angle of the mouth of pipe of sampling obtains the error of this moment, and it is given to produce speed by integral operation, with given Laying head (5) the transmission cabinet of passing to of this speed.When using Laying head (5) when speed is controlled, we can pass through the given angle value of man-machine interface equally, by more given and error actual angle, can judge the accuracy of head location, judge to carry out fault fast.The control thinking is as follows:
First steel is to the mouth of pipe of weaving silk → sampling actual angle → comparator computing → new angle
Steel to HMD2 → detection error → integral operation → generation speed given → Laying head (5) transmission cabinet
Because it is frequent to change spinneret, spinneret has the band guide groove and not with the difference of guide groove, we have increased the corresponding calculated program.
The present invention's concrete example in use is exemplified below:
1. the operative employee selects flying shear to shear the head location by man-machine interface, and this computer-chronograph is defeated by PLC with this information by the RSVIE32 man-machine interface system;
2. after the head of rolled piece arrives the mouth of pipe of weaving silk, this moment the weave silk actual position value of dish (9) of photoelectric tube (7) sampling, PLC obtains actual angle, obtain the angle of next root steel by series of computation, this moment, we can compare the deviation of actual angle and given angle, if deviation proves that with interior person the operation of Laying head (5) head navigation system is normal at 20 degree.
3. can allow this moment the site operation personnel observe the position that falls that rolled piece is in fact weaved silk, if fall undesirable can the adjustment angle again in position.
Wire head clan material phase angle standard value, we are set at and transmit about the wire rod circle bundle peak of roller-way (6) top in the 15 degree deviation ranges.
Claims (2)
1, automatic control method of head orientation of laying head, comprise that shearing the arrival of steel wire material length adjustment rolled piece with flying shear weaves silk the mouth of pipe time, it is characterized in that hot metal detector HMD1 (1) being set at the flying shearing machine front end, at the preceding hot metal detector HMD2 (4) that is provided with of finishing mill (3) back Laying head (5), at dish (9) top both sides fixed light fulgurites (7) and the receiver thereof of weaving silk, at dish (9) the optoelectronic induction piece of upper fixed (8) of weaving silk, the temporal information that two hot metal detectors arrive the wire rod head this detection position respectively is transferred to central processor CPU, and the temporal information that photoelectric tube (7) also will detect optoelectronic induction piece (8) simultaneously is transferred to central processor CPU;
Central processor CPU is done following running:
1. the temporal information of photoelectric tube (7) input sensor block (8) is calculated the rotating speed of dish (9) of weaving silk, and calculate the weave silk phase angle of dish (9) of per period at times with the time that rotates a circle;
2. the temporal calculation that two hot metal detectors input wire rod head is arrived goes out the wire rod point-to-point speed;
3. calculate the arrival phase angle that the wire rod head arrives the dish (9) of weaving silk with hot metal detector HMD2 (4) with distance, wire rod linear running speed, dish (9) rotating speed of weaving silk of dish (9) of weaving silk, the instant phase angles data of the dish (9) of weaving silk;
4. arrive the phase angle with the wire rod head, dish (9) rotating speed of weaving silk, dish (9) the blanking Time Calculation of weaving silk go out wire rod head blanking phase angle;
5. the blanking phase angle standard value with blanking phase angle and setting compares computing, calculates relative error;
6. relative error, dish (9) rotating speed of weaving silk, dish (9) diameter of weaving silk, wire rod point-to-point speed are calculated wire rod cover length correction value;
7. calculate the time correction value that the wire rod head enters the dish (9) of weaving silk with wire rod cover length correction value, calculate back single line material with this time correction value again and shear the correction time;
8. flying shear is sheared correction time input flying shear control device;
The flying shear shearing control device adds lead start-up time with the shearing correction time of input, start shear arrangement (2) back single line material sheared so that wire rod behind finish rolling, circle volume the end of a thread blanking phase angle in the given time.
2, automatic control method of head orientation of laying head, comprise that shearing the arrival of steel wire material length adjustment rolled piece with flying shear weaves silk the mouth of pipe time, it is characterized in that, it is characterized in that hot metal detector HMD1 (1) being set at the flying shearing machine front end, at the preceding hot metal detector HMD2 (4) that is provided with of finishing mill (3) back Laying head (5), at dish (9) top both sides fixed light fulgurites (7) and the receiver thereof of weaving silk, at dish (9) the optoelectronic induction piece of upper fixed (8) of weaving silk, the temporal information that two hot metal detectors arrive the wire rod head this detection position respectively is transferred to central processor CPU, and the temporal information that photoelectric tube (7) also will detect optoelectronic induction piece (8) simultaneously is transferred to central processor CPU;
Central processor CPU is done following running:
1. the temporal information of photoelectric tube (7) input sensor block (8) is calculated the rotating speed of dish (9) of weaving silk, and calculate the weave silk phase angle of dish (9) of per period at times with the time that rotates a circle;
2. the temporal calculation that two hot metal detectors input wire rod head is arrived goes out the wire rod point-to-point speed;
3. calculate the arrival phase angle that the wire rod head arrives the dish (9) of weaving silk with hot metal detector HMD2 (4) with distance, wire rod linear running speed, dish (9) rotating speed of weaving silk of dish (9) of weaving silk, the instant phase angles data of the dish (9) of weaving silk;
4. arrive the phase angle with the wire rod head, dish (9) rotating speed of weaving silk, dish (9) the blanking Time Calculation of weaving silk go out wire rod head blanking phase angle;
5. the blanking phase angle standard value with blanking phase angle and setting compares computing, calculates relative error;
6. relative error, dish (9) rotating speed of weaving silk, dish (9) diameter of weaving silk, wire rod point-to-point speed are calculated dish (9) the rotating speed correction value of weaving silk, just this correction value input Laying head (5) control device;
Laying head (5) control device is pressed the rotating speed correction value, regulates motor speed by Laying head (5) transmission cabinet, makes single line material head blanking phase angle, back in given scope.
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| CNA200810071019XA CN101332475A (en) | 2008-07-23 | 2008-07-23 | Automatic control method of head orientation of laying head |
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| CNA200810071019XA CN101332475A (en) | 2008-07-23 | 2008-07-23 | Automatic control method of head orientation of laying head |
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| CN102411379A (en) * | 2011-09-05 | 2012-04-11 | 佛山市顺德区泰纶拉链有限公司 | Apparatus capable of accurately controlling zipper length and control method thereof |
| CN101776888B (en) * | 2009-07-10 | 2012-05-09 | 固高科技(深圳)有限公司 | Shearing method of flying shears and special motion controller for flying shears |
| CN102680471A (en) * | 2012-04-27 | 2012-09-19 | 深圳市中钞科信金融科技有限公司 | Machine visual detection device based on transmission chain and method |
| CN102773766A (en) * | 2011-05-12 | 2012-11-14 | 上海宝信软件股份有限公司 | Self-zeroing control method for cutting of flying shear |
| CN102830724A (en) * | 2012-07-23 | 2012-12-19 | 中冶南方工程技术有限公司 | Control method for horizontal velocity of shearing rolled piece of hot-rolled section steel flying shear |
| CN102989781A (en) * | 2012-06-12 | 2013-03-27 | 内蒙古包钢钢联股份有限公司 | Automatic control technology for head positioning of laying head of high-speed wire mill |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101776888B (en) * | 2009-07-10 | 2012-05-09 | 固高科技(深圳)有限公司 | Shearing method of flying shears and special motion controller for flying shears |
| CN102773766B (en) * | 2011-05-12 | 2016-01-13 | 上海宝信软件股份有限公司 | Self-zeroing control method sheared by flying shear |
| CN102773766A (en) * | 2011-05-12 | 2012-11-14 | 上海宝信软件股份有限公司 | Self-zeroing control method for cutting of flying shear |
| CN102411379A (en) * | 2011-09-05 | 2012-04-11 | 佛山市顺德区泰纶拉链有限公司 | Apparatus capable of accurately controlling zipper length and control method thereof |
| CN102680471B (en) * | 2012-04-27 | 2015-01-21 | 深圳市中钞科信金融科技有限公司 | Machine visual detection device based on transmission chain and method |
| CN102680471A (en) * | 2012-04-27 | 2012-09-19 | 深圳市中钞科信金融科技有限公司 | Machine visual detection device based on transmission chain and method |
| CN102989781A (en) * | 2012-06-12 | 2013-03-27 | 内蒙古包钢钢联股份有限公司 | Automatic control technology for head positioning of laying head of high-speed wire mill |
| CN102830724A (en) * | 2012-07-23 | 2012-12-19 | 中冶南方工程技术有限公司 | Control method for horizontal velocity of shearing rolled piece of hot-rolled section steel flying shear |
| CN102830724B (en) * | 2012-07-23 | 2015-01-28 | 中冶南方工程技术有限公司 | Control method for horizontal velocity of shearing rolled piece of hot-rolled section steel flying shear |
| CN111922101A (en) * | 2020-08-20 | 2020-11-13 | 中天钢铁集团有限公司 | High-speed wire packet type arranging equipment and control method thereof |
| CN111922101B (en) * | 2020-08-20 | 2024-05-28 | 中天钢铁集团有限公司 | High-speed coil type normalization equipment and control method thereof |
| CN112058919A (en) * | 2020-09-29 | 2020-12-11 | 张家港宏昌钢板有限公司 | Automatic wire tail hooking device and operation process thereof |
| CN114236237A (en) * | 2021-12-17 | 2022-03-25 | 成都锦江电子***工程有限公司 | Single-end phase correction method for phase-matching cable assembly |
| CN114236237B (en) * | 2021-12-17 | 2023-08-25 | 成都锦江电子***工程有限公司 | Single-ended phase correction method for phase matching cable assembly |
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